US1431594A - Road-grading machine - Google Patents

Description

P. J. OSWALD.

ROAD GRADING MACHINE.- APPLICATION FILED MAR. 29, 1920.

. Patented. @013 M19, 1922..

6 SHEETSSHEET I.

IN VEN TOR A TTORNEYwi P. J. OSWALD.

ROAD GRADING MACHINE.

APPLICATION FILED MAR 29, 1920.

Patented (m 110, 1922.,

6 SHEETS-SHEET 2.

IN VEN TOR.

A TTORNEYGE I P. J. OSWALD. ROAD GRADING MACHINE.

' APPLICATION FILED MAR- 29, 1920. I I ILA-3 llfl l lPmnted 0%.. M 1922;,

EETS-SHEH 3.

P. J. OSWALD.

ROAD GRADING MACHINE.

APPLICATION FILED MAR. 29, 1920. b 1 1 59$ Patented Oct. 110, 11922.

6 SHEETS-SHEET 4.

a? O M M 55 M 5 @5 I I fi P. J. OSWALD.

ROAD GRADING MACHINE. APPLICATION'FILED 'MAR. 29, 1920.

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Patented Oct. 10, 1922 6 SHEETS-SHEET 5.

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6 SHEETS-SHEET 6.

INVENTOR .wM/M/ ATTORNEY PETER J. OSWALD, OJE" BAY CITY, MICHIGAN.

ROAD-GRADING MACHINE.

Continuation of application Serial No. 277,482, filed February 17, 1919.

This application filed March 29,

1920. Serial No. 369,793;

T 0 all who mitt may concern:

Be it known that I, PETER J. OswALD, a citizen of the United States of America, residing at Bay City, in the county of Bay and State of Michigan, have invented certain new and useful Improvements in Road- Grading Machines, of which the following is a specification.

The present invention relates to road grading machines, and more particularly to that type which is motor driven and motor operated, and this application constitutes a continuation of the application filed February 17, 1919, and bearing Serial No. 277 ,482.

An object of this invention is to provide a machine of this character which is capable of efficient operation upon not only the ordinary dirt road, but also upon what are known as stone roads, which will break, grade and roll the road in one operation upon practically all kinds of roads and particularly upon stone roads where the surface is composed of crushed rock gravelled over and firmly packed but continuous travel of heavy vehicles which renders the surface of the stone road as hard as concrete.

Another object of the invention is to provide rollers which may be increased or decreased as to their effective weights for adapting the machine to. soils and roadways of different types, and of difl'erent degrees of hardness. This object also embraces the provision of a yieldingly mounted supporting roller which is capable of pressing the surface of the roadway and which also adapts itself to projections or obstacles met with during the operation of the machine.

A further object of the invention is to provide a plurality of teeth for breaking and scraping the surface of the roadway and to peculiarly support the teeth for ad justment beneath the machine so that the teeth will adapt themselves to inequalities in the surface and may be readily adjusted, removed and replaced, This feature of the invention is adapted to facilitate the sharpening of the teeth and to admit proper replacement'and interchange thereof to meet the various conditions found in operating the machine.

A still further object of this invention is and advantages in view, the present invention consists in the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims, it being understood that changes may be made in the form,

size, proportion and minor details without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings,

Fig. 1 is a side elevation of a road grading machine constructed according to the present invention.

Fig. 2 is a top plan view of the same, the canopy being removed.

Fig. 3 is a rear elevation of the machine,

Fig. 4 is an enlarged longitudinal section through the gear casing arranged across the forward portion of the machine.

Fig. 5 is a horizontal section taken through one of the large rear rollers.

Fig. 6 is a side elevation of the same.

I Fig. 7 is a fragmentary side elevation of v the intermediate rear roller.

Fig. 8 is a fragmentary, enlarged, top plan view of the surface breaking and scraping teeth, showing the frame therefor.

Fig. 9 is a fragmentary enlarged view of the same with the supporting and adjusting means therefor.

Fig. 10 is a further enlarged transverse section through the breaker and scraper, showing the mounting of the teeth therein.

Fig. 11 is an enlarged fragmentary view in section of the power adjusting means for the scraper and breaker.

Fig. 12 is a detail top plan view of the grader knife and its support.

Fig. 13 is a side elevation of the same.

Fig. 1% is a detail side elevation, partly in section of the manually operable device for adjusting the transverse angle of the blade.

Fig. 15; is an enlarged transverse section through the same taken on the line 15l5 of Fig. 14.

Fig. I6 is a top plan view of the hand ably braced to accommodate and support the various parts hereinafter described. 'Alr-' ranged upon the middle of the frame is a motor 11 of preferably the internal combustion engine type and which has the usual radiator 12 and transmission mechanism 13, the latter being controlled by a hand lever 14. The rear end of the motor 12 is connected, through the transmission mechanism 13, to a longitudinally disposed drive shaft 9 15. The shaft 15 is connected to a suitable differential gear device 16 which includes transverse shafts 17 provided with pinions 18 meshing with toothed wheels 19 carried upon the inner sides of a pair of rollers 20. The rollers 20 each comprise, as best seen in Figs. 5 and 6, hollow drums or bodies which are closed and adapted to contain a body of fluid, such as water or oil, and each roller has a removable plug 21 in its outer side facilitating introduction and removal of the fluid for varying the effective weight of the roller.

The frame 10 is provided with a pair of spaced apart bars. 22' arranged longitudinally therein and having their end portions extending between the rollers 20. As shown to advantage in Fig. 7, these bars 22 have secured upon their under sides a leaf spring 23, the ends of which are shackled as at 24 to a subframe 25 upon which an intermediate roller 26 is mounted. The frame 25 has depending spaced apart. brackets 27 upon which is journaled a shaft 28 supporting the roller 26. The roller 26 is thus mounted between the large rollers 20 and is adapted to rise and fall under tension of the spring 23 and obstacles met with in the surface over which the machine travels.

The said longitudinal shaft 15 is adapted to be connected at its forward end and in the usual manner with a front differential mechanism 29 including transverse shafts 30 which carry pinions 31 meshing with toothed wheels 32 secured to front steering and supporting wheels 33. These wheels 33 are mounted upon an axle 34 supported in a pivoted frame 35 which is turned by chains 36 and 37.

Each chain is connected at its forward end to an I bolt 38 having a spring 39 coiled thereabout and vheld on the I bolt by a washer 40. The I bolt is connected to the frame 35 by an ear 41 through which the I bolt freely slides to form a yieldable connection between the chain and the pivoted frame.- The rear ends of the chains 36 and 37 are wound oppositely upon, and are secured to a transverse shaft 42 journaled in the frame and adapted to be turned in either direction by the motor 11.

A gear casing 43 is arranged across the frame 10 forwardly of the shaft 42, and as shown in Fig. 4, is of suitable configuration for accommodating a series of intermeshing gears as will be subsequently described.

The forward end of the crank shaft 44 of the motor 11 projects through the gear casing 43 and is provided therein with a gear wheel 45 which meshes with idlers 46 and which in turn mesh with gear wheels 47. One of the gear wheels 47 preferably at the right hand side of the machine, meshes with another gear wheel 48mounted upon a shaft 49 which projects rearwardly from the cusing 43 and carries a bevel gear wheel 50.

Shdably mounted upon the transverse shaft 42 are beveled gear wheels 51 and 52 arranged in spaced relation and adapted to alternately engage the bevel gear wheel 50. A rock shaft 53 is mounted in suitable bearings upon the frame 10 and has a depending fork 54 connected to the gear wheels 51 and 52 for shiftinglthe same through a handle 55 carried upon the rock shaft. The steering power shaft 42 may thus be driven in either direction for guiding the machine through operation of the gear wheels in the forward transmission casing 43.

The frame 10 carries, beneath its forward end and in rear of the steering frame 35 a surface breaker which is connected by a draft bar 56 to the steering frame 35 and which, as shown in Figs. 8, 9, and 10, comprises a transverse bar or frame 57 having upstanding pairs of ears 58 arranged in rows at the forward and rear edges of the bar 57. Each pair of ears has a closure or backing wall 59 forming with the cars a pocket or seat into which are fitted cutter points 60 supported by the walls 59 at the desired angle. Preferably, the inner faces of the wall 59 are serrated or otherwise roughened to provide a frictional surface for preventin the cutter bars or teeth 50 from slipping. 11 each pocket is ivoted, or otherwise suitably disposed, a loc ing key 61having a toothed edge and adapted to be forced against the free side of the tooth] 60 by a cam or eccentrics 62. The eccentrics 62 are secured in front and rear rows upon shafts 63 which turn in the ears 58 for simultaneously operating all of the cams of the respective row. A handle 64 may be placed upon each shaft 63 for conveniently turning the shaft into locking and releasing positions. By turning the shaft 63 the rows of cutters may be quickly released for removing the cutters for sharpening, for interchanging the cutters or teeth, and for adjusting the lengths of the depending ends of the teeth.

The frame of bar 57 is provided with upstanding sockets 65 preferably near the opposite ends of the bar and arranged to receive the lower ends of chains 66, or other flexible elements upon which the bar 57 may be hung. Springs 67 surround the chains 66 and are seated at their lower ends upon the sockets 65 and are compressed at their upper ends by collars 68" set upon the upper rigid ends of the chains 66. The scraper or surface breaker may thus be urged downward at the desired tension. A bar 69 is connected to the upper ends of the chains 66 and carries upstandin threaded rods 70 upon which are threa ed bevel pinions 71 mounted in a housing 72 supported upon the frame 10. The housing 72 has a boss 73 through which the rods 70 slidably engage and upon which the pinions 71 rest. Bracket arms or webs 74 are provided within the easing 72 and overhang the bosses 73 for receiving the upper ends of the rods 70 and for engaging the tops of the pinions 71. The pinions are thus held against vertical movement and when turned cause the rods 70 to move up or down through the casing.

The casing 72 carries a shaft 75 having a bevel gear wheel 76 thereon meshing with the adjacent pinion 71, there being a casing 72 at each side of the frame over the respective lifting rod 70. Within each casing 72 there is also j ournaled a longitudinally shiftable shaft 77 carrying upon opposite ends,

bevel gear-wheels 78 and 79 adapted to alternately engage the opposite sides of a bevel gear wheel 80, the latter being mounted upon a shaft 81 which sup orts the gear wheel 47 and which is driven tliereby. The" shaft 77 is connected by a fork 82 to a shifting rod 83 which extends longitudinally at the side of the frame and which is adapted to be rocked for shifting the shafts 77. The rods 83 are provided near their rear ends with depend .ing arms 84 connected together .by connecting bar 85 attheir lower ends for causing the simultaneous movement of the rods 83.

The shafts 47 extend rearwardly from the casing 43 and project into rear casings 84 which are arranged at opposite sides of the motor 11 and provided with bevel gear wheels and the shafts 77 similar to the construction above described in the casings 72.

mounted upon the frame 10 in axial alignment with the rods or shafts 83 and connected together by depending arms 87 and connecting rod 88. The adjacent ends of the shafts 83 and 86 are notched, as at 89 and are slidably engaged in the opposite ends of the hub 90 of a -shifting lever 91. The lever 91, as shown in Fig. 19, may be moved longitudinally of the shafts 83 and 86 and has in the hub thereof pins 92 adapted to alternately engage in the notches 89 for interlocking the desired shaft, 83 or 86, to the lever 91. When interlocked, the lever 91 may then be turned to carry therewith the shaft 83 or shaft 86 for operating either the teeth or the vertically movable rods 93 of a grader knife 94; The lower ends of the vertical rods 93, constructed similar to the rods 66, are connected at their lower ends to a cross bar 95 .which is mounted upon a frame 96 connected at its forward end to the main frame 10.

The frame 96 has an upwardly inclined forward projection 97 through which is slidably mounted a bolt 98 having a spring 99 thereon interposed between the head of the bolt and the forward end of the projection 97. The forward end of the bolt is pivoted upon a pin 100 in a bracket 101 fixed to the bottom of the frame 10 for forming a yieldable draft connection between the main frame and the grader frame 96.

A turntable 102 is mounted in the frame 96 and has secured directly thereto the grader knife 94 held in position by straps 103 and braces 104. The turntable 102 has internal gear teeth 105 with which meshes a pinion 106 carried upon the lower end of a shaft section 107. As shown in Fig. 14, the shaft 107 has its upper end squared and fitted slidably in a sleeve 108 which receives in its upper end a corresponding shaft 109. The shaft 109 carries a bevel pinion 110 meshing with a second bevel pinion 111 carried on a shaft 112, the latter provided with a hand wheel 113 arranged above the frame 10 in a suitable position for easy access. Turning of the hand wheel 113 causes the turntable 102 to turn and carry the knife or blade 94 into the desired angular relation transversely beneath the main frame 10.

The machine is also provided with a fuel tank 114 mounted preferably at one side and at the rear of the motor 11, and may have a canopy or cover 115 secured upon uprights 116 which rise from the frame 10.

By control of the connections between the engine 11 and the several mechanisms of the machine, the rollers 20 may be caused to turn for driving the machine and the steering shaft 42 may be caused to turn in desired direction for guiding the machine in its desired path of travel.

By manipulating the lever.91 as above described it may be interlocked with the shaft 83 for rocking the same and moving the shafts 77 of the front gear casings 72 into position for either raising or lowering the breaking teeth. Similarly, the lever 91 may be interlocked with the shaft 86 for rocking the latter and shifting the shafts 7 7 in the rear gear casings 84 to either raise or lower the grader knife.

The rollers 20 may be filled to the desired height wit-h fluid for giving the required weight to the rollers for packing and compressing the road surface. The spring 23 of the rear intermediate roller is of sufficient tension to force the small roller 26 downwardly against the road surface with substantially the same pressure as "have the large rollers 20.

It is of course understood that the above specifically described machine is but one embodiment of this invention and that various changes and modifications may be made in the same to accommodate the features of the invention to conditions of manufacture and use met with in the construction and operation of the machine, and that such modifications are restricted only by the scope of the following claims.

What is claimed is:

1.-In a self propelled road grading machine, a main frame having a motor mounted thereon, spaced apart rollers for supporting the rear end thereof and a smaller spring actuated roller between the first mentioned rollers, a front sub-frame, and ground engaging wheels journaled thereon, means for pivotally connecting the front end of the main frame thereto, a surface breaker suspended from the main frame, means for raising and lowering same, and a draft bar connection between the surface breaker and the front sub-frame. v

2. In a self propelled road grading machine, a frame, steering wheels supporting the forward end of the frame, a motor arranged intermediate the ends of the frame, a shaft journaled lengthwise in the frame and having connection to the motor for operation thereby, steering mechanism on the forward end of the frame, breaker teeth, hoisting means on the forward end of the frame, a scraper blade hoisting means intermediate the ends of the frame,.and transmission mechanism connected to said mechanism and both of said means and being manually controllable for independently actuating the same, a pair of rollers supporting the rear of the frame, and differential mechanism at the front and rear for positively driving the ground engaging wheels.

3. In a self propelled road grading machine, a; main frame having a motor mounted thereon, spaced apart hollow wheels for supporting the rear end thereof, a shaft journaled lengthwise in the frame and having connection with the motor, and a driving threaded rods for connecting the tooth bar connection between the rear wheels and the said shaft, a front sub-frame, ground engaging wheels journaled thereon, means for pivotally connecting the front end of the main frame thereto, steering mechanism on the main frame and having flexible connection to the sides of the sub-frame, a surface breaker suspended from the main frame, means for raising and lowering said surface breaker and a draft bar connection between the sub-frame and the surface breaker.

4. In a self-propelled road grading machine, a frame, steering wheels supporting the forward end thereof, a motor mounted on the frame, a gear housing arranged transversly in the forward end of the frame, intermeshing gear wheels arranged in the housing from end to end thereof, one of said gear wheels connected to the motor for driving all of said gear wheels, a steering 8o device, a surface breaker suspended from the frame, a scraper bar, and means for adjusting same, clutches for said surface breaker and scraper bar connected to said gear wheels, and manually controlled connections between the clutches and the gear wheels for independently operating the devices through the gear wheels, spaced apart rollers supporting the rear end of the frame, a spring actuated frame between the first 95 mentioned rollers, and a small roller journaled thereon, and means for positively driving the ground engaging wheels.

5. In a self-propelled road grading machine, a frame, steering wheels supporting the forward end thereof, a motor mounted on the frame, a train of gear wheels carried upon the forward end of the frame with one gear wheel connected to the motor, steering mechanism on the frame, vertically adjustable surface breaking teeth carried by the frame, a vertically adjustable scraper blade carried by the frame, and manually controlled clutches between the ear Wheels and the steering mechanism and the vertically adjustable devices for selectively operating the same by the motor.

6. In a self propelled road grading machine, a frame, a tooth bar, spaced apart to the frame, a flexible connector between the tooth bar and the rods, ,a spring surrounding the flexible connector and adjustable thereon for urging the bar downwardly, a plurality of teeth adjustably mounted on the bar, a draft bar between the tooth bar and the forward end of the frame, a friction having a threaded opening adapted to be mounted on and engage the end of the threaded rod, and means for driving said friction in a forward or reverse direction for raising or lowering said tooth bar.

7. In a self propelled road grading ma chine, a main frame and a sub-frame to which the main frame is pivotally connected,

a tooth bar, a chain between the tooth bar and the frame for supporting the former, teeth on the bar, a spring adjustably mounted on the chain for urging the bar down wardly, teeth on the bar, a draft connection between the main frame and the sub-frame, and means for vertically adjusting the chain.

8. In a self propelled road ,gradingmachine, a main frame, a sub front frame to which the main frame is pivotall connected, steering wheels supporting the orward end of the frame, a pair of hollow rollers mounted on the rear end of the frame and adapted to receive a weight imparting sub stance, means for driving said rollers to propel the machine, and asmall spring pressed roller carried between the hollow rollers for rolling the roadway between the first mentioned driven rollers.

9. In a road grading machine, a frame, means for supporting the forward end of the frame, a pair of transversely spaced apart rollers mounted upon the rear end of the frame, said rollers being hollow and having removable caps for introduction and removal of a weight imparting substance, a small roller arranged between the hollow rollers, and a spring connection between the small roller and the frame for supporting the latter and permitting the small roller to rise over projections in the surface of the roadway.

10. In a self propelled road grading machine, a main frame, a sub-frame to which the main frame is pivotally connected, a motor mounted on the frame, a shaft arranged longitudinally in the frame, a road engaging steering mechanism on the forward end of the main frame and including supporting wheels on the sub-frame and a differential driving mechanism connecting the wheels to the forward end of said shaft, rollers mounted upon the rear end of theframe, and a difi'erential driving mechanism between the rollers and the rear end of said shaft, for positively driving the ground engaging wheels.

11. In a self propelled road grading machine, a frame, a pair of threaded rods, pinions threaded on the rods and supported in the frame, means for turning the pinions to raise and lower the rods, a bar supported upon the lower ends of the rods, and a toothed road surface breaker suspended from said bar.

12. In a self propelled road grading machine, a main frame, a sub-frame to which the main frame is pivotally connected, a pair of threaded rods, pinions threaded on the rods and supported horizontally in the main frame, a motor on the frame, a driving connection between the motor and the pinions for turning the latter, a bar connecting the free ends of the rods, and a surface breaker mounted on the bar and having a draft connection with the sub-frame, a grader bar resiliently connected to the 'main frame, and means for adjusting saidbar, and hollow rollers behind the said grader bar for sup porting the main frame and adapted to be driven from the motor.

In testimony whereof I afix my signature.

PETER J. OSWALD.

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